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https://www.readbyqxmd.com/read/28802150/mir-let-7a-regulates-anti-citrullinated-protein-antibody-induced-macrophage-activation-and-correlates-with-the-development-of-experimental-rheumatoid-arthritis
#1
Wei Zhu, Jianbo Yu, Shou Qiu, Haifeng Liu, Yan Wang, Xiaoyan Xu, Lili Shao, Lingling Zhu, Yan Jiao, Fan Liu, Xiaodong Zhu
Anti-citrullinated protein antibodies (ACPAs) are a key serological marker of rheumatoid arthritis (RA). To investigate whether miR-let7a downregulated ACPA-induced macrophage activation and arthritis, miR-let7a levels were assessed in the synovial fluid from patients with RA or osteoarthritis (OA). In addition, expression of the pro-inflammatory genes HMGA2, PI3K, and IRF5 was examined in ACPA-induced macrophages and a collagen antibody-induced mouse model of arthritis. As expected, miR-let7a expression in synovial fluid macrophages was substantially lower in patients with RA than in those with OA...
August 9, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28801345/molecular-basis-for-increased-susceptibility-of-indigenous-north-americans-to-seropositive-rheumatoid-arthritis
#2
Stephen W Scally, Soi-Cheng Law, Yi Tian Ting, Jurgen van Heemst, Jeremy Sokolove, Aaron J Deutsch, E Bridie Clemens, Antonis K Moustakas, George K Papadopoulos, Diane van der Woude, Irene Smolik, Carol A Hitchon, David B Robinson, Elizabeth D Ferucci, Charles N Bernstein, Xiaobo Meng, Vidyanand Anaparti, Tom Huizinga, Katherine Kedzierska, Hugh H Reid, Soumya Raychaudhuri, René E Toes, Jamie Rossjohn, Hani El-Gabalawy, Ranjeny Thomas
OBJECTIVE: The pathogenetic mechanisms by which HLA-DRB1 alleles are associated with anticitrullinated peptide antibody (ACPA)-positive rheumatoid arthritis (RA) are incompletely understood. RA high-risk HLA-DRB1 alleles are known to share a common motif, the 'shared susceptibility epitope (SE)'. Here, the electropositive P4 pocket of HLA-DRB1 accommodates self-peptide residues containing citrulline but not arginine. HLA-DRB1 His/Phe13β stratifies with ACPA-positive RA, while His13βSer polymorphisms stratify with ACPA-negative RA and RA protection...
August 11, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28795508/occupation-and-risk-of-developing-rheumatoid-arthritis-results-from-a-population-based-case-control-study
#3
Anna Ilar, Lars Alfredsson, Pernilla Wiebert, Lars Klareskog, Camilla Bengtsson
OBJECTIVE: Environmental factors are of importance for the etiology of rheumatoid arthritis (RA), but much remains unknown concerning the contributions from distinct occupational hazards. We explored the association between occupation and the risk of anti-citrullinated protein antibody (ACPA) + RA or ACPA- RA. METHODS: We analyzed 3,522 cases and 5,580 controls from the Swedish population-based EIRA case-control study. A questionnaire was used to obtain information on work history and lifestyle factors...
August 10, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28794511/rheumatoid-arthritis-acpa-specific-synovial-immunophenotypes
#4
Dario Ummarino
No abstract text is available yet for this article.
August 10, 2017: Nature Reviews. Rheumatology
https://www.readbyqxmd.com/read/28791449/incidence-of-inflammatory-joint-diseases-in-finland-results-from-a-population-based-epidemiological-study
#5
A Kononoff, L Arstila, P Pussinen, H Kautiainen, P Elfving, E Savolainen, H Niinisalo, J Rutanen, O Marjoniemi, O Kaipiainen-Seppänen
The objective of the study was to assess the incidence of inflammatory joint diseases and possible environmental factors contributing to their occurrence in a defined population in Finland. All rheumatologists practising in the Northern Savo rheumatological outpatient departments collected data on their newly diagnosed patients with an inflammatory joint disease in 2010. Antibodies to Aggregatibacter actinomycetemcomitans (Aa) and Porphyromonas gingivalis (Pg) were determined from patients with various arthritides...
August 8, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28777897/joint-distribution-and-2-year-outcome-in-347-patients-with-monoarthritis-of-less-than-16-weeks-duration
#6
Ellen Sauar Norli, Gina Hetland Brinkmann, Tore Kristian Kvien, Olav Bjørneboe, Anne Julsrud Haugen, Halvor Nygaard, Cathrine Thunem, Elisabeth Lie, Maria Dahl Mjaavatten
OBJECTIVE: To study the joint distribution and 2-year outcome of patients with recent-onset monoarthritis. METHODS: Adult patients with clinically apparent monoarthritis of ≤16 weeks' duration were included in a multi-center 2-year longitudinal study. Clinical characteristics, joint distribution, development of chronic inflammatory rheumatic disease (CIRD), as well as classification according to the 2010 ACR/EULAR classification criteria for rheumatoid arthritis (2010 RA criteria) were studied...
August 4, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28769133/the-prevalence-of-ana-antibodies-anticentromere-antibodies-and-anti-cyclic-citrullinated-peptide-antibodies-in-patients-with-primary-sj%C3%A3-gren-s-syndrome-compared-to-patients-with-dryness-symptoms-without-primary-sj%C3%A3-gren-s-syndrome-confirmation
#7
Maria Maślińska, Małgorzata Mańczak, Bożena Wojciechowska, Brygida Kwiatkowska
OBJECTIVES: Our study analyses the prevalence of ANA, anti-SS-A, anti-SS-B, and ACA and ACPA antibodies in patients with pSS and with dryness symptoms without pSS confirmation, and the association of ACPA and ACA antibodies with specific clinical symptoms. MATERIALS AND METHODS: 113 patients were divided into two groups: I - with diagnosed pSS (N = 75); and II - with dryness without pSS evidence (N = 38). Diagnostics: indirect immunofluorescence (IF; Hep-2 cell line) of antinuclear antibodies (ANA), anti-SS-A anti-SS-B antibodies determined with semi-quantitative method, autoantibody profile (14 antigens, ANA Profil 3 EUROLINE); basic laboratory, ophthalmic examination tests, minor salivary gland biopsy with focus score (FS), joint and lung evaluation, and ESSDAI questionnaire (pSS activity)...
2017: Reumatologia
https://www.readbyqxmd.com/read/28751821/immunomodulation-of-ra-patients-pbmc-with-a-multiepitope-peptide-derived-from-citrullinated-autoantigens
#8
Smadar Gertel, Gidi Karmon, Sivan Vainer, Ora Shovman, Martin Cornillet, Guy Serre, Yehuda Shoenfeld, Howard Amital
Citrullinated peptides are used for measuring anticitrullinated protein antibodies (ACPA) in rheumatoid arthritis (RA). Accumulation of citrullinated proteins in the inflamed synovium suggests that they may be good targets for inducing peripheral tolerance. In view of the multiplicity of citrullinated autoantigens described as ACPA targets, we generated a multiepitope citrullinated peptide (Cit-ME) from the sequences of major citrullinated autoantigens: filaggrin, β-fibrinogen, vimentin, and collagen type II...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28732135/synovial-immunophenotype-and-anti-citrullinated-protein-antibodies-in-ra-patients-relationship-to-treatment-response-and-radiological-prognosis
#9
Carl Orr, Aurelie Najm, Monika Biniecka, Trudy McGarry, Chin-Teck Ng, Francis Young, Ursula Fearon, Douglas J Veale
OBJECTIVE: Serum anti-citrullinated peptide antibodies (ACPA) may be present before development of rheumatoid arthritis (RA) and may predict more severe, erosive disease. This study examines synovial tissue immunophenotype according to ACPA status in RA patients, response to treatment and erosive status. METHODS: Consecutive RA patients were prospectively recruited and underwent clinical and serological assessment before and after treatment. Radiological assessment was performed at the time of clinical follow up...
July 21, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28708862/anti-citrullinated-protein-antibody-positive-rheumatoid-arthritis-is-primarily-determined-by-rheumatoid-factor-titre-and-the-shared-epitope-rather-than-smoking-per-se
#10
Dan Murphy, Derek Mattey, David Hutchinson
OBJECTIVE: To analyse the relationship between rheumatoid factor (RF) titre, smoking and HLA-DRB1 alleles coding a "shared epitope" (SE) in relation to anti-citrullinated protein antibody (ACPA) positivity in rheumatoid arthritis (RA). METHODS: RA patients (n = 658) attending rheumatology clinics in Cornwall, UK (cohort 1) were stratified according to RF and ACPA titre, and smoking pack years at diagnosis. A further 409 RA patients from North Staffordshire, UK (cohort 2) were studied to confirm the relationship between RF levels, smoking and ACPA positivity in relation to SE status...
2017: PloS One
https://www.readbyqxmd.com/read/28702930/personalized-medicine-in-rheumatology-the-paradigm-of-serum-autoantibodies
#11
REVIEW
Silvia Sirotti, Elena Generali, Angela Ceribelli, Natasa Isailovic, Maria De Santis, Carlo Selmi
The sequencing of the human genome is now well recognized as the starting point of personalized medicine. Nonetheless, everyone is unique and can develop different phenotypes of the same disease, despite identical genotypes, as well illustrated by discordant monozygotic twins. To recognize these differences, one of the easiest and most familiar examples of biomarkers capable of identifying and predicting the outcome of patients is represented by serum autoantibodies. In this review, we will describe the concept of personalized medicine and discuss the predictive, prognostic and preventive role of antinuclear antibodies (ANA), anti-citrullinated peptide antibodies (ACPA), rare autoantibodies and anti-drug antibodies (ADA), to evaluate how these can help to identify different disease immune phenotypes and to choose the best option for treating and monitoring rheumatic patients in everyday practice...
December 2017: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/28695293/hla-class-ii-and-rheumatoid-arthritis-the-bumpy-road-of-revelation
#12
REVIEW
Arieke S B Kampstra, René E M Toes
Rheumatoid arthritis (RA) is a chronic auto-immune disease primarily targeting the joints. Approximately 1% of the population is affected by RA, and despite the improvements in therapeutic interventions, elucidation of the disease pathogenesis is still in its infancy. RA patients can be subdivided on basis of the presence of autoantibodies, especially anti-citrullinated protein antibodies (ACPA). ACPA(+) and ACPA(-) disease most likely differ in aetiology, as different genetic and environmental risk factors are associated with these two disease entities...
July 11, 2017: Immunogenetics
https://www.readbyqxmd.com/read/28683209/acpa-s-75th-annual-meeting
#13
(no author information available yet)
No abstract text is available yet for this article.
May 2017: Cleft Palate-craniofacial Journal
https://www.readbyqxmd.com/read/28679953/anti-citrullinated-protein-antibodies-cause-arthritis-by-cross-reactivity-to-joint-cartilage
#14
Changrong Ge, Dongmei Tong, Bibo Liang, Erik Lönnblom, Nadine Schneider, Cecilia Hagert, Johan Viljanen, Burcu Ayoglu, Roma Stawikowska, Peter Nilsson, Gregg B Fields, Thomas Skogh, Alf Kastbom, Jan Kihlberg, Harald Burkhardt, Doreen Dobritzsch, Rikard Holmdahl
Today, it is known that autoimmune diseases start a long time before clinical symptoms appear. Anti-citrullinated protein antibodies (ACPAs) appear many years before the clinical onset of rheumatoid arthritis (RA). However, it is still unclear if and how ACPAs are arthritogenic. To better understand the molecular basis of pathogenicity of ACPAs, we investigated autoantibodies reactive against the C1 epitope of collagen type II (CII) and its citrullinated variants. We found that these antibodies are commonly occurring in RA...
July 6, 2017: JCI Insight
https://www.readbyqxmd.com/read/28674691/influence-of-cigarette-smoking-on-rheumatoid-arthritis-risk-in-the-han-chinese-population
#15
Jian Yin, Dongyi He, Lei Jiang, Fang Cheng, Qian Guo, Shaolan Huang, Xiaofeng Zeng, Yi Liu, Matthew A Brown, Huji Xu
OBJECTIVES: Cigarette smoking has been shown in European populations to be associated with rheumatoid arthritis (RA) susceptibility. This study aims to examine the association of smoking with RA in the Han Chinese population. METHODS: 718 Han Chinese RA patients and 404 healthy controls were studied. The associations of cigarette smoking (current, former or ever vs. never smokers, and pack-years of exposure) with RA, anti-cyclic citrullinated peptide antibody (ACPA) positive RA, IgM rheumatoid factor (RF) positive RA, and baseline radiographic erosions (modified van der Heijde-Sharp scores) were assessed...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28666971/postmenopausal-osteoporosis-in-rheumatoid-arthritis-the-estrogen-deficiency-immune-mechanisms-link
#16
REVIEW
Rony Sapir-Koren, Gregory Livshits
Rheumatoid arthritis (RA) is characterized, among other factors, by systemic bone loss, reaching ~50% prevalence of osteoporosis in postmenopausal women. This is roughly a doubled prevalence in comparison with age-matched non-RA women. Postmenopausal RA women are more likely to be sero-positive for the anti-citrullinated peptide antibody (ACPA). Our extensive review of recent scientific literature enabled us to propose several mechanisms as responsible for the accelerated bone loss in ACPA(+) RA postmenopausal women...
June 27, 2017: Bone
https://www.readbyqxmd.com/read/28660910/rheumatoid-arthritis-acpa-status-influences-ra-development
#17
Dario Ummarino
No abstract text is available yet for this article.
August 2017: Nature Reviews. Rheumatology
https://www.readbyqxmd.com/read/28653215/nlrp1-ptpn22-and-padi4-gene-polymorphisms-and-rheumatoid-arthritis-in-acpa-positive-singaporean-chinese
#18
Liuh Ling Goh, Mei Yun Yong, Wei Qiang See, Edward Yu Wing Chee, Pei Qi Lim, Ee Tzun Koh, Khai Pang Leong
Studies have shown that the genetic risk factors for rheumatoid arthritis (RA) differ substantially between Asian and Caucasian populations. Even among Asian populations, the genetic contributions of NLRP1, PTPN22 and PADI4 have been controversial. Consequently, we sought to address these separate findings and determine whether any of these proposed risk variants are associated with RA susceptibility, onset, DAS activity and erosion in a Singaporean Chinese cohort. We genotyped five SNPs within NLRP1 (rs878329 and rs6502867), PTPN22 (rs2488457 and rs6665194), and PADI4 (rs2240340) in 500 anti-cyclic citrullinated peptide antibody-positive (ACPA) patients with RA and 500 healthy controls using TaqMan assays...
August 2017: Rheumatology International
https://www.readbyqxmd.com/read/28650341/two-rheumatoid-arthritis-specific-autoantigens-correlate-microbial-immunity-with-autoimmune-responses-in-joints
#19
Annalisa Pianta, Sheila L Arvikar, Klemen Strle, Elise E Drouin, Qi Wang, Catherine E Costello, Allen C Steere
In rheumatoid arthritis (RA), immunological triggers at mucosal sites, such as the gut microbiota, may promote autoimmunity that affects joints. Here, we used discovery-based proteomics to detect HLA-DR-presented peptides in synovia or peripheral blood mononuclear cells and identified 2 autoantigens, N-acetylglucosamine-6-sulfatase (GNS) and filamin A (FLNA), as targets of T and B cell responses in 52% and 56% of RA patients, respectively. Both GNS and FLNA were highly expressed in synovia. GNS appeared to be citrullinated, and GNS antibody values correlated with anti-citrullinated protein antibody (ACPA) levels...
August 1, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28643530/assessment-of-local-carotid-stiffness-in-seronegative-and-seropositive-rheumatoid-arthritis
#20
Abdullah Nabi Aslan, Ayşe Nur Şirin Özcan, Şükran Erten, Yakup Alsancak, Tahir Durmaz
OBJECTIVES: Rheumatoid arthritis (RA) is a chronic, inflammatory disease associated with increased risk of cardiovascular (CV) disease. Arterial stiffness (AS) is an independent predictor of CV events. This study aimed to analyse local carotid AS parameters in seronegative and seropositive RA patients. DESIGN: Of 347 consecutive RA patients, we selected specifically those who were free of established CV diseases and risk factors. As a result, 140 patients (126 women, 52...
June 23, 2017: Scandinavian Cardiovascular Journal: SCJ
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